programs/winecfg/drivedetect.c

   1 /*
   2  * Drive autodetection code
   3  *
   4  * Copyright 2004 Mike Hearn
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include <wine/debug.h>
  26 #include <wine/library.h>
  27
  28 #include "winecfg.h"
  29
  30 #include <stdio.h>
  31 #ifdef HAVE_MNTENT_H
  32 #include <mntent.h>
  33 #endif
  34 #include <stdlib.h>
  35 #include <errno.h>
  36
  37 #include <sys/stat.h>
  38
  39 #include <winbase.h>
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(winecfg);
  42
  43 BOOL gui_mode = TRUE;
  44 static long working_mask = 0;
  45
  46 #ifdef HAVE_MNTENT_H
  47
  48 static const DEV_NODES sDeviceNodes[] = {
  49   {"/dev/fd", DRIVE_REMOVABLE},
  50   {"/dev/pf", DRIVE_REMOVABLE},
  51   {"/dev/aztcd", DRIVE_CDROM},
  52   {"/dev/bpcd", DRIVE_CDROM},
  53   {"/dev/cdrom", DRIVE_CDROM},
  54   {"/dev/cdu535", DRIVE_CDROM},
  55   {"/dev/cdwriter", DRIVE_CDROM},
  56   {"/dev/cm205cd", DRIVE_CDROM},
  57   {"/dev/cm206cd", DRIVE_CDROM},
  58   {"/dev/gscd", DRIVE_CDROM},
  59   {"/dev/hitcd", DRIVE_CDROM},
  60   {"/dev/iseries/vcd", DRIVE_CDROM},
  61   {"/dev/lmscd", DRIVE_CDROM},
  62   {"/dev/mcd", DRIVE_CDROM},
  63   {"/dev/optcd", DRIVE_CDROM},
  64   {"/dev/pcd", DRIVE_CDROM},
  65   {"/dev/sbpcd", DRIVE_CDROM},
  66   {"/dev/scd", DRIVE_CDROM},
  67   {"/dev/sjcd", DRIVE_CDROM},
  68   {"/dev/sonycd", DRIVE_CDROM},
  69   {"/dev/sr", DRIVE_CDROM},
  70   {"",0}
  71 };
  72
  73 static const char * const ignored_fstypes[] = {
  74     "devpts",
  75     "tmpfs",
  76     "proc",
  77     "sysfs",
  78     "swap",
  79     "usbdevfs",
  80     "rpc_pipefs",
  81     "binfmt_misc",
  82     NULL
  83 };
  84
  85 static const char * const ignored_mnt_dirs[] = {
  86     "/boot",
  87     NULL
  88 };
  89
  90 static int try_dev_node(char *dev)
  91 {
  92     const DEV_NODES *pDevNodes = sDeviceNodes;
  93
  94     while(pDevNodes->szNode[0])
  95     {
  96         if(!strncmp(dev,pDevNodes->szNode,strlen(pDevNodes->szNode)))
  97             return pDevNodes->nType;
  98         ++pDevNodes;
  99     }
 100
 101     return DRIVE_FIXED;
 102 }
 103
 104 static BOOL should_ignore_fstype(char *type)
 105 {
 106     const char * const *s;
 107
 108     for (s = ignored_fstypes; *s; s++)
 109         if (!strcmp(*s, type)) return TRUE;
 110
 111     return FALSE;
 112 }
 113
 114 static BOOL should_ignore_mnt_dir(char *dir)
 115 {
 116     const char * const *s;
 117
 118     for (s = ignored_mnt_dirs; *s; s++)
 119         if (!strcmp(*s, dir)) return TRUE;
 120
 121     return FALSE;
 122 }
 123
 124 static BOOL is_drive_defined(char *path)
 125 {
 126     int i;
 127
 128     for (i = 0; i < 26; i++)
 129         if (drives[i].in_use && !strcmp(drives[i].unixpath, path)) return TRUE;
 130
 131     return FALSE;
 132 }
 133
 134 /* returns Z + 1 if there are no more available letters */
 135 static char allocate_letter(int type)
 136 {
 137     char letter, start;
 138
 139     if (type == DRIVE_REMOVABLE)
 140         start = 'A';
 141     else
 142         start = 'C';
 143
 144     for (letter = start; letter <= 'Z'; letter++)
 145         if ((DRIVE_MASK_BIT(letter) & working_mask) != 0) break;
 146
 147     return letter;
 148 }
 149 #endif
 150
 151 #define FSTAB_OPEN 1
 152 #define NO_MORE_LETTERS 2
 153 #define NO_ROOT 3
 154 #define NO_DRIVE_C 4
 155 #define NO_HOME 5
 156
 157 static void report_error(int code)
 158 {
 159     char *buffer;
 160     int len;
 161
 162     switch (code)
 163     {
 164         case FSTAB_OPEN:
 165             if (gui_mode)
 166             {
 167                 static const char s[] = "Could not open your mountpoint description table.\n\nOpening of /etc/fstab failed: %s";
 168                 len = snprintf(NULL, 0, s, strerror(errno));
 169                 buffer = HeapAlloc(GetProcessHeap(), 0, len + 1);
 170                 snprintf(buffer, len, s, strerror(errno));
 171                 MessageBox(NULL, s, "", MB_OK | MB_ICONEXCLAMATION);
 172                 HeapFree(GetProcessHeap(), 0, buffer);
 173             }
 174             else
 175             {
 176                 fprintf(stderr, "winecfg: could not open fstab: %s\n", strerror(errno));
 177             }
 178             break;
 179
 180         case NO_MORE_LETTERS:
 181             if (gui_mode) MessageBox(NULL, "No more letters are available to auto-detect available drives with.", "", MB_OK | MB_ICONEXCLAMATION);
 182             fprintf(stderr, "winecfg: no more available letters while scanning /etc/fstab\n");
 183             break;
 184
 185         case NO_ROOT:
 186             if (gui_mode) MessageBox(NULL, "Could not ensure that the root directory was mapped.\n\n"
 187                                      "This can happen if you run out of drive letters. "
 188                                      "It's important to have the root directory mapped, otherwise Wine"
 189                                      "will not be able to always find the programs you want to run. "
 190                                      "Try unmapping a drive letter then trying again.", "",
 191                                      MB_OK | MB_ICONEXCLAMATION);
 192             else fprintf(stderr, "winecfg: unable to map root drive\n");
 193             break;
 194
 195         case NO_DRIVE_C:
 196             if (gui_mode)
 197                 MessageBox(NULL, "No virtual drive C mapped\n\nTry running wineprefixcreate", "", MB_OK | MB_ICONEXCLAMATION);
 198             else
 199                 fprintf(stderr, "winecfg: no drive_c directory\n");
 200
 201         case NO_HOME:
 202             if (gui_mode)
 203                 MessageBox(NULL, "Could not ensure that your home directory was mapped.\n\n"
 204                                  "This can happen if you run out of drive letters. "
 205                                  "Try unmapping a drive letter then try again.", "",
 206                                  MB_OK | MB_ICONEXCLAMATION);
 207             else
 208                 fprintf(stderr, "winecfg: unable to map home drive\n");
 209             break;
 210     }
 211 }
 212
 213 static void ensure_root_is_mapped(void)
 214 {
 215     int i;
 216     BOOL mapped = FALSE;
 217
 218     for (i = 0; i < 26; i++)
 219         if (drives[i].in_use && !strcmp(drives[i].unixpath, "/")) mapped = TRUE;
 220
 221     if (!mapped)
 222     {
 223         /* work backwards from Z, trying to map it */
 224         char letter;
 225
 226         for (letter = 'Z'; letter >= 'A'; letter--)
 227         {
 228             if (!drives[letter - 'A'].in_use)
 229             {
 230                 add_drive(letter, "/", "System", "0", DRIVE_FIXED);
 231                 WINE_TRACE("allocated drive %c as the root drive\n", letter);
 232                 break;
 233             }
 234         }
 235
 236         if (letter == ('A' - 1)) report_error(NO_ROOT);
 237     }
 238 }
 239
 240 static void ensure_home_is_mapped(void)
 241 {
 242     int i;
 243     BOOL mapped = FALSE;
 244     char *home = getenv("HOME");
 245
 246     if (!home) return;
 247
 248     for (i = 0; i < 26; i++)
 249         if (drives[i].in_use && !strcmp(drives[i].unixpath, home)) mapped = TRUE;
 250
 251     if (!mapped)
 252     {
 253         char letter;
 254
 255         for (letter = 'H'; letter <= 'Z'; letter++)
 256         {
 257             if (!drives[letter - 'A'].in_use)
 258             {
 259                 add_drive(letter, home, "Home", "0", DRIVE_FIXED);
 260                 WINE_TRACE("allocated drive %c as the user's home directory\n", letter);
 261                 break;
 262             }
 263         }
 264         if (letter == ('Z' + 1)) report_error(NO_HOME);
 265     }
 266 }
 267
 268 static void ensure_drive_c_is_mapped(void)
 269 {
 270     struct stat buf;
 271     const char *configdir = wine_get_config_dir();
 272     int len;
 273     char *drive_c_dir;
 274
 275     if (drives[2].in_use) return;
 276
 277     len = snprintf(NULL, 0, "%s/../drive_c", configdir);
 278     drive_c_dir = HeapAlloc(GetProcessHeap(), 0, len);
 279     snprintf(drive_c_dir, len, "%s/../drive_c", configdir);
 280     HeapFree(GetProcessHeap(), 0, drive_c_dir);
 281
 282     if (stat(drive_c_dir, &buf) == 0)
 283     {
 284         add_drive('C', "../drive_c", "Virtual Windows Drive", "0", DRIVE_FIXED);
 285     }
 286     else
 287     {
 288         report_error(NO_DRIVE_C);
 289     }
 290 }
 291
 292 int autodetect_drives()
 293 {
 294 #ifdef HAVE_MNTENT_H
 295     struct mntent *ent;
 296     FILE *fstab;
 297 #endif
 298
 299     /* we want to build a list of autodetected drives, then ensure each entry
 300        exists in the users setup. so, we superimpose the autodetected drives
 301        onto whatever is pre-existing.
 302
 303        for now let's just rummage around inside the fstab.
 304      */
 305
 306     load_drives();
 307
 308     working_mask = drive_available_mask('\0');
 309
 310 #ifdef HAVE_MNTENT_H
 311     fstab = fopen("/etc/fstab", "r");
 312     if (!fstab)
 313     {
 314         report_error(FSTAB_OPEN);
 315         return FALSE;
 316     }
 317
 318     while ((ent = getmntent(fstab)))
 319     {
 320         char letter;
 321         char label[256];
 322         int type;
 323
 324         WINE_TRACE("ent->mnt_dir=%s\n", ent->mnt_dir);
 325
 326         if (should_ignore_fstype(ent->mnt_type)) continue;
 327         if (should_ignore_mnt_dir(ent->mnt_dir)) continue;
 328         if (is_drive_defined(ent->mnt_dir)) continue;
 329
 330         if (!strcmp(ent->mnt_type, "nfs")) type = DRIVE_REMOTE;
 331         else if (!strcmp(ent->mnt_type, "nfs4")) type = DRIVE_REMOTE;
 332         else if (!strcmp(ent->mnt_type, "smbfs")) type = DRIVE_REMOTE;
 333         else if (!strcmp(ent->mnt_type, "cifs")) type = DRIVE_REMOTE;
 334         else if (!strcmp(ent->mnt_type, "coda")) type = DRIVE_REMOTE;
 335         else if (!strcmp(ent->mnt_type, "iso9660")) type = DRIVE_CDROM;
 336         else if (!strcmp(ent->mnt_type, "ramfs")) type = DRIVE_RAMDISK;
 337         else type = try_dev_node(ent->mnt_fsname);
 338
 339         /* allocate a drive for it */
 340         letter = allocate_letter(type);
 341         if (letter == ']')
 342         {
 343             report_error(NO_MORE_LETTERS);
 344             fclose(fstab);
 345             return FALSE;
 346         }
 347
 348         strcpy(label, "Drive X");
 349         label[6] = letter;
 350
 351         WINE_TRACE("adding drive %c for %s, type %s with label %s\n", letter, ent->mnt_dir, ent->mnt_type,label);
 352
 353         add_drive(letter, ent->mnt_dir, label, "0", type);
 354
 355         /* working_mask is a map of the drive letters still available. */
 356         working_mask &= ~DRIVE_MASK_BIT(letter);
 357     }
 358
 359     fclose(fstab);
 360 #endif
 361
 362     ensure_root_is_mapped();
 363
 364     ensure_drive_c_is_mapped();
 365
 366     ensure_home_is_mapped();
 367
 368     return TRUE;
 369 }